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Last Updated: Friday, February 3, 2012 12:03 PM
Areas Subject to Transportation Conformity Requirements in California
|
County/Planning Area/Air District |
Regional Planning Agency Doing Conformity Analysis |
Reason for Conformity Requirements (Federal Nonattainment Pollutant, or Attainment with "Section 175A" Maintenance SIP) |
|---|---|---|
| Tehama | Tehama County Transportation Commission |
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No MPO — Rural Area |
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Yuba and Northern Sutter (outside Sacramento ozone area) |
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Sacramento Metropolitan area: Sacramento; Southern Sutter; Yolo; Solano (E. part); El Dorado, Placer (except Lake Tahoe basin) |
Sacramento Area Council of Governments Metropolitan Transportation Commission |
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El Dorado, Placer; Nevada Dept. of Environmental Protection (Lake Tahoe basin) |
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Bay Area AQMD: Sonoma (S. part), Napa, Solano (W. part), Marin, Contra Costa, Alameda, San Francisco, San Mateo, Santa Clara |
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No MPO — Rural Area |
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No MPO — Rural Area Tuolumne Co. Transportation Council Mariposa County LTC (Public Works - Transportation Planning)) |
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Kern |
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| San Luis Obispo | San Luis Obispo Council of Governments |
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Los Angeles |
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Los Angeles |
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San Bernardino |
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San Bernardino |
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San Bernardino |
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Riverside |
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Riverside |
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No MPO — Rural Area |
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No MPO — Rural Area |
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Conformity Areas Table with Regional Conformity Status (PDF file)
Notes:
The latest Air Pollution Control District
and Air Quality Management District contact information
can be obtained through the California
Air Resources Board 
. Links above were current as of August, 2009. Air district information can also be obtained at CAPCOA .
For the latest contact information related to State and Regional transportation planning agencies, refer to the Caltrans Transportation Planning web site. MPO/RTPA web links were current as of August, 2009. MPO and RTPA information can also be obtained at CALCOG .
Maps and other materials related to nonattainment area designations in California can be found at the California Air Resources Board, and at EPA Region 9 (both ).
This table is based only on Federal nonattainment and attainment-maintenance status (see 40 CFR 81.305 and the U.S. EPA "Green Book") , which triggers Transportation Conformity requirements under 40 CFR 93 Subpart A . Most nonattainment areas also have a "classification" (Moderate, Serious, etc.) for each relevant pollutant that affects details of the conformity process but does not affect whether or not conformity requirements apply. Consult the ARB and EPA web sites for classifications.
Many additional areas fail to attain one or more State air quality standards. Compliance with State standards is important for environmental analysis purposes but is not part of the Conformity process under the Federal Clean Air Act. For information regarding nonattainment status for State standards, consult the ARB web site.
More information regarding Transportation Conformity, including links to legislation, regulations, and guidance, can be found at the Federal Highway Administration and EPA web sites (both ).
Sources:
Federal Highway Administration , US
Environmental Protection Agency , California
Air Resources Board ,
Metropolitan Planning Organizations shown in table , Caltrans Division of Transportation Planning
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